Ferdinand I vs Ferdinand I of Leon

Ferdinand I and Ferdinand I of Leon both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ferdinand I	Yes	No	No	No
Ferdinand I of Leon	Yes	No	No	No

As nouns, Ferdinand I and Ferdinand I of Leon are synonyms defined as:

Ferdinand I and Ferdinand I of Leon: king of Castile and Leon who achieved control of the Moorish kings of Saragossa and Seville and Toledo (1016-1065)

Other synonyms of Ferdinand I include Ferdinand the Great.

Ferdinand I (noun)	Ferdinand I of Leon (noun)
king of Castile and Leon who achieved control of the Moorish kings of Saragossa and Seville and Toledo (1016-1065)	king of Castile and Leon who achieved control of the Moorish kings of Saragossa and Seville and Toledo (1016-1065)
Holy Roman Emperor and king of Hungary and Bohemia (1503-1564)